Cherry tree named ‘PA5UNIBO’

ABSTRACT

‘PA5UNIBO’ is a novel cherry tree derived from a seedling of unknown cross which was planted at Vignola, Modena Province, Italy. The genus and species (cultivar) of ‘PA5UNIBO’ is  Prunus avium . It was initially propagated by grafting to root stocks of varying vigor and, after testing in districts and plantings of differing types, proved to have the qualities proper to a promising new cultivar for the market.

Latin name of the genus/species of the plant claimed (cultivar): Prunusavium.

Variety denomination: PA5UNIBO.

CROSS-REFERENCE TO RELATED APPLICATIONS

Priority is claimed of the pending EU Plant Patent for ‘PA5UNIBO’, whichwas filed on 25 May 2012 as Application No. 2012/1161 in the name ofApplicant (holder) Alma Mater Studiorum—University of Bologna, theentire contents of which is expressly incorporated herein by reference.EU Trademark for ‘Sweet Saretta’ was released on 2 Jan. 2013 asRegistration No. 011058691 of Applicant (holder) Alma MaterStudiorum—University of Bologna. Such European Trademark is associatedto PA5UNIBO and used to distinguish such cherry variety from the others.

BACKGROUND OF THE INVENTION

‘PA5UNIBO’ named ‘Sweet Saretta’, derived from seedling of unknown crossand originally called Selection DCA BO B5A87, was planted at Vignola,Modena Province, Italy, in February 2002 and first cropped in 2004. Itwas initially propagated by grafting to root stocks of varying vigorand, after testing in districts and plantings of differing types, provedto have the properties proper to a promising new cultivar for themarket. It picks in the second decade to the end of June, about 22-24days after early known cultivars such as ‘Burlat’ (and about 6 daysafter ‘Bing’, but before known later harvest types such as ‘Lapins’.

BRIEF SUMMARY OF THE INVENTION

The parentage of the variety is unknown. The name of a known variety forcomparison to comparable harvest date is ‘Sylvia’. However, compared to‘Sylvia’, Prunus avium ‘PA5UNIBO’ has larger fruit of firmer flesh, moreuniform ripening and higher sugar content. The fruit is comparable insize to ‘Duroni 3’ and ‘Sunburst’ varieties, and the prevailing caliberis 30-32 mm. ‘PA5UNIBO’ was selected for its high qualities, includingtree growth and yield performance, fruit appearance (bright red, scale 4CTIFL), with excellent taste-flavor properties, aromatic and very sweetwith a good level of acidity. The distinctive traits of ‘PA5UNIBO’ alsoinclude mid-to-late picking date, uniform ripening, and high fieldperformance. The date of cross was in the year 2000. The location of thediscovery was Vignola, Modena Province, Italy. The date of the firstasexual propagation was in 2008 in Vignola, Modena Province, Italy.‘PA5UNIBO’ resulted from a cross of unknown varieties, but was initiallypropagated on root stock of ‘Gisela 6’ (U.S. Plant Pat. No. 8,954) inthe trial fields of Bologna University to test field and croppingperformance in a medium-to-high density planting.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying photographs show typical specimens of the new varietyas depicted in color as nearly true as is reasonably possible in colorillustrations of this character.

FIG. 1 illustrates the detail of fully-open blossoms of PA5UNIBO.

FIG. 2 is the flower, full front, in profile and with separated petals,of PA5UNIBO.

FIG. 3 shows the leaf profile of PA5UNIBO. Two leaves have been detachedand one has been placed upper leaf surface side down to show the lowerleaf surface details.

FIG. 4 illustrates the details of a fruit cropping, including an examplemeasurement, of PA5UNIBO.

FIG. 5 shows the tree architecture of PA5UNIBO with width-spread andheight.

DETAILED BOTANICAL DESCRIPTION OF THE VARIETY

-   General:    -   -   Age of described tree(s).—5 years, slender spindle training            system.        -   Location of described trees(s).—Vignola, Modena Province,            Italy.        -   Name of color chart used.—The Royal Horticultural Society            Colour Chart.        -   Name of root stock.—‘Gisela 6’.-   Tree:    -   -   Vigor.—High.        -   Height.—3.5-4 meters.        -   Spread.—3 meters.        -   Growth habit.—Open canopy.        -   Canopy density.—Medium.        -   Trunk diameter at specified height.—16-17 cm, as measured at            about 5 cm above graft joint.        -   Trunk color.—Dark reddish-brown (200A).        -   Bark texture.—Of average roughness.        -   Tendency toward alternate bearing.—No.        -   Winter hardiness.—Unknown, no winter cold damage found in            this Po Valley district.        -   Chilling requirement.—Unknown.-   Branch:    -   -   Length.—160-220 cm of main branches.        -   Diameter.—5-8 cm.        -   Crotch angle.—45-60° depending on training system.        -   Bark color.—Dark reddish-brown (200A).        -   Bark texture.—Of verge roughness.-   Current year shoot:    -   -   Length.—40-60 cm.        -   Color.—Dark reddish-brown (200C/200D) with fairly diffuse            gray overtone (201A).-   Winter hardiness:    -   -   USDA hardiness zone.—Unknown.        -   Chilling requirement.—Unknown.-   Flower buds:    -   -   Number per spur.—4-6, mostly 5.        -   Shape.—Ovoid.        -   Length.—About 1 cm.        -   Diameter.—Under 1 cm.        -   Color.—Reddish perules (187C).-   Flowers:    -   -   Number per cluster.—Minimum 7-maximum 11 per spur, 2-3 per            bud. Abundant bloom.        -   Relative position of petals.—Slightly overlapping petals.        -   Diameter.—38-40 mm.        -   Depth.—16-18 mm, as measured from receptacle to maximum            petal aperture.        -   Is pollen produced?.—Yes.        -   Coloration of pollen.—Yellow (13A).-   Sepal:    -   -   Length.—6-7 mm.        -   Shape.—Conical.        -   Width.—About 5 mm.        -   Apex.—Pointed.        -   Base.—Pointed.        -   Margin descriptors.—Regular margin. Color — upper surface:            Green (139C). Color — lower surface: Pale green (138C).-   Petals:    -   -   Number per flower.—5.        -   Shape.—Circular.        -   Length.—16-19 mm.        -   Width.—16-17 mm.        -   Apex.—Slightly sunken.        -   Base.—Slightly pointed.        -   Margin.—Slightly undulated. Color — upper surface White            (155B). Color — lower surface White (155B).-   Bloom:    -   -   Date of bud burst.—7-8 Apr. 2013.        -   Date of first bloom.—13 Apr. 2013.        -   Date of full bloom.—16 Apr. 2013.-   Pedicel:    -   -   Length.—26-34 mm.        -   Diameter.—1.2-1.4 mm.        -   Color.—Green (143B).-   Pistil:    -   -   Quantity.—1.        -   Size.—15-19 mm.        -   Color.—Green (143C).-   Anthers:    -   -   Quantity.—26-30 of 5-15 mm length; many anthers in each            flower are at the same height as the stigma and some exceed            it. White filament (155D).        -   Size.—Under 1 mm diameter.        -   Color.—Yellow (15C).-   Stigma:    -   -   Quantity.—1.        -   Size.—About 1 mm.        -   Color.—Green (142A).-   Styles:    -   -   Quantity.—1.        -   Size.—12-14 mm length.        -   Color.—Pale-white-green (142C) tending toward rosé (36C) at            end of bloom.-   Ovary/ies:    -   -   Quantity.—1.        -   Size.—3-5 mm.        -   Color.—Green (143C).-   Leaves:    -   -   Length.—13.7-15.8 cm.        -   Width.—6.7-9.1 cm.        -   Shape.—Elliptical.        -   Apex shape.—Pointed.        -   Base shape.—Pointed.        -   Margin.—Fine-toothed. Color — upper surface: Dark green            (137A/137B). Color — lower surface: Pale green (138B) with            green-yellow central vein (152A/152B).-   Petiole:    -   -   Length.—3.4-4.6 cm.        -   Diameter.—About 2 mm.        -   Color.—Green-yellow (152A/152B) under and reddish upper            (183A).-   Fruit:    -   -   Shape.—Heart-shaped.        -   Diameter.—Mostly 30-32 mm.        -   Height.—26-28 mm.        -   Weight.—11-12 grams, average weight.        -   Number per cluster.—6-9 per spur.        -   Skin color (include ground color and over color).—Bright red            (N186C) tending toward bright vermilion red (N186B) at            advanced maturity.        -   Presence of lenticels.—Yes.        -   Density of lenticels.—Medium.        -   Skin thickness.—Medium-thin.        -   Skin texture.—Medium.        -   Anthocyanin coloration present near skin?.—No.        -   Tenacity of flesh to stone.—Low.        -   Flesh color.—Red (53A).        -   Flesh texture.—Fine.        -   Juiciness.—High.        -   Juice analysis (brix, acidity, tss, etc.).—18.5° Brix and            7.8 g/l malic acid (2012 data).        -   Stone size.—Medium.        -   Stone shape.—Elliptical.        -   Stone color.—Pale brown (165D).-   Fruit stem:    -   -   Length.—36-39 mm.        -   Diameter.—Just over 1 mm.        -   Color.—Green (143B).-   Harvest:    -   -   Maturity date range.—June 10-June 30, approximately 22-24            days after ‘Burlat’ and about 4-6 days after optimum US            harvest dates of June 15-June 20 for ‘Bing’.        -   Harvest date range (if different).—Same as above.

‘PA5UNIBO’ is a diploid cultivar and is self-fertile (S3S4′ alleles).Fruit load and yield have always been high and consistent, particularlyin presence of flying insects (e.g., bees, wasps, hornets, beetles andbutterflies).

Under observation during planting, growing and harvesting under normalcultural and growing conditions in Modena Province, Italy, no particularinsect or plant/fruit disease resistance or susceptibility has beenobserved.

Because of the outstanding and unique horticultural characters of theclaimed plant, especially its long harvest period and large size, thischerry can be planted to extend the cultivar's season. Although this newvariety of cherry possesses the above-described characteristics, it isto be understood that variations and fluctuations may occur in themagnitude and qualities due to changes in growing and climateconditions, irrigation, fertilization, pruning and pest control.

What is claimed is:
 1. A new and distinct cherry tree as hereindescribed and illustrated.